Safety device for elevators.



No. 704.468. 'Patented July 8. 1902.

W. H. -WILS EY. ,SAFETY DEVICE FOR ELEVATORS.

(Application med A r. 12. 19o2.

(No Model.)

V'IA// UNrrnn STATES PATENT OFFICE.

WILLIAM H. WILSEY, OF SIOUX CITY, IOWVA.

SAFETY DEVICE FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. *704,468, dated July 8, 1902.

Application filed April12, 1902.

TO all whom 'z may concern:

Be it known that I, WILLIAM H. WILsEY, a citizen of the United States, residing at Sioux City, in the county of W'oodbury and State of Iowa, have invented new and useful Improvements in Safety Devices for Elevators, of which the following is a specification.

This invention relates to safety devices for elevators, it being of that kind having means for preventing the well-door being opened except when the elevator-car is stopped opposite the landing upon which said Well-door is located and the ascent of the car while the well-door is open for the entrauce or exit of passengers. Generallythespacebetween the car and the inner wall of the well is very slight, and it is essential to avoid all projections on the car or cage on the outside thereof. In existing apparatus of 'this character parts thereof on the car project so far from the same as to render the same impossible in many cases of successful installation.

One object of the invention is to provide a simple, inexpensive, and practical safety device for elevators which can be readily installed on all types of elevators. In the present case the parts of the appliance are inclosed or housed by the car or cage.

The invention includes, in combination with an elevator-well having an opening, a door for said opening, a latch for holding the door shut, a car, a controller on the car, a detent effective for holding the controller in a central position, and means upon the latch for holding the detent in its effective position when the door is opened and the detent when in its inefiective position serving to prevent retractive movement of the latch; and the several partsmay be of any suitable construction, material, or disposition, the invention not being limited in these respects, although I will hereinafter describe an arrangement which is adapted for securing the desired results.

The invention is clearly illustrated' in the accompanying drawings, forming a part of this specifioation, and in which- Figure 1 is an inside face View of an elevator-car and a portion of its well, the deso tent being shown in its effective position.

Fig. 2 is a similar view showing the detent in its inefiective position. Fig. 3 is a trans- Serial No. 102 636. (No model.)

verse sectional elevation, the section being taken in.the line 3 3 of Fig. 1 and looking toward theright. Fig. 4 is a similar View, the section being taken in the line 4 4, Fig. 1. Fig. 5 is a detail in plan View hereinai'ter more particularly described.

i Like characters refer to like parts in all the figures of the drawings. r

Referring now to the drawings, the numer-al 10 indicates the well of an elevator, and 11 a car or cage adapted to travel therein. The well or-casinglO has au opening 12, adapted to be closed by the door 13, which is shown as being of the sliding kind and which is held shut by the usual latch. i

The car is provided with a controller 14, which is shown as a swinging or oscillating lev er carried by the rock-shaft 15, suitably n ounted upon the car and connected with the usual Operating mechanisn. In Fig. 1 the controller is shown as being in its central or ineffective position or that which it occupies when stopping the car. i When thrown to the left orright of this position, as the case may be, the car will be caused to ascend or descend. Thenumeral 16 indicates a detent which is mounted upon the inside of the car and is adapted when in its effective position to maintain the controller 14 in a central position in order to hold the car against movement. The detent 16 has a body-of segmental form, it being provided at one end (shown at the left) with an angular projection 17, through which the pivot-screw 18 is adapted to extend. Such screw also passes through one end of the `segmental' guide-plate 19, while a similar screw 20 passes through the opposite end of said guide plate, the two screws serving to hold s-uch plate in place. The screws also pass through the ends of a similar plate 21 'in parallelism with the other plate, and the controlling-lever 14-is adapted to oscillate between such plates.

The segmental body of the detent 16 has on its under side the notch 22, the Walls of which are beveled and converge toward the upper side of the detent. When the lever 14 ICO' 'the controller is swung to its central position the spring will instantly Shift the detent into I its eifective position.

- position to register with a similar hole or per'- a The door 13 is provided at a suitable height with a ledge 25, extending entirely across the same, said ledge being horizontally disposed and having a vertical ,web snitably secured to the inside face of said door.

To the outer side of the car ll, at a suitable point-say near the floor thereof-I secure the lower end of the latch 26, the latter consisting in the present case of afiat spring. The latch 26, which, it willbe seen, is yieldable, is adapted when the car is immediately above or below the floor or landing to be disposed in the path of the ledge 25, which constitutes a suitable catch, so as to arrest the movement of the door when an. attempt When, however, j the controller is brought to a central position g is made to open the same.

in order to stop the car or cage at the floor or landing, the latch can be retracted and the ledge or catch 25 by hearing against the said latch at or near its free end will maintain the same in its position to lock the detent 16 in position to maintain the controller in its central position.

The segmental or arcuate body has at or near its free end the perforation or hole 27, adapted when said detent is in its efiective foration 28, extending through the wall of the car. The latch 26 has at its upper end the lug or pin 29 It will be understood that when the car is moving up or down in its well the detent l6- will be in its elevated position, as shown in Fig. 2, so that if an attempt be made to open the door the latter when it moves a trifiing distance will retract or force back the spring-latch 26 or until the pin or lug 29 strikes the solid part of the detent 16 either above or below the perforation 27, so

that practically no movement of the door in a direction to open the same can be accomplished. When, however, the elevator-car is stopped, (and it will be necessary to bring the controller let into a central or vertical position in order to do this,) the holes 27 and 28 will be caused to register, so that the door can be opened all the'way,and as it opens' the spring-latch is forced backward and the pin or lug 29 thereon is caused to enter the per- V foration 27, thereby preventing the detent 16 from noving, and this relation will be prolonged while the door is open, it being understood that the ledge 25 is in contact with the free end of the spring-latch. When, 'however, the door is closed,the latch will automatically move into position to again arrest the opening of the door, and as it does so the pin or 4 lug 29 will be carried out of the perforation 27, so that the detent can be lifted. When the pin releases the detent, the controller 14: can be swung either to the right or to the left, and as it does so the projection 23 thereon will ride along one or the other of the inclined faces of the notch 22, so as to lift said detent or to put it into position to prevent retractive movement of the latch 26. 'The car carries on the inside thereof the bracket 30, suitably Secured thereto, and which overhangs and is in contact with or substantially in contact with the free end of the detent, so as to hold said detent solid when the pin or lng29 is forced against the imperforate por tion of the same.

What is shown as the inner end of the ledge or catch 25 is shown as beveled at 35, and the beveled face 35 is adapted when the holes 27 and 28 are broughtinto registration, as hereinbefore set forth, to ride along the spring-latch 26, so as to force said latch rearward and cause the pin 29 to enter said registering openings, such beveled face being shown in Fig. 5.

Having described the invention, what I claim is- 1. The co mbination of an elevator-wellhav 1 ing an opening, a door forsaid opening,alatch door can be opened, and as it is opened the 1 for holding the door shut, a car, a controller on the car, a detent operative independently of said controller and' effective for holding the controller in a central position, and means -upon the latch for holding the detent in its ef ting an opening, a door for said opening,a latch for holding the door shut, a car, a controller on the car, a detent operative independently of said control] er and effective for holding the controller in a central position and having a perforation, and a pin upon the latch adapted to enter said perforation when the detent is in its eifective position.

3. The combination of an elevator-well hav* ing an opening, a door for said opening,alatch for holding the door shut, a car, a controller on the car, having a projection, anotched detent, the notch of which is adapted to engage over the projection on the controller, and

said detent having a perforation, and a pin.

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door is open, and the detent When in its ineffective position serving to prevent retractive movement of the latch.

5. The combination of an elevator-well having an opening, a door for said opening, a latch for holding the door shut, a car, a controller on the car, a detent operative independently of said controller and effective for holding the controller in a central position, means upon the latch for holding the detentin its effective position when the door is opened, and the detent When in its ineffeotive position servin g to prevent retractive movement of the latch, and means upon the door for holding said latch in its retracted position while the door is open.

6. The combination of an elevator-well havingan opening, a door for said opening, aledge extending entirely across the door, a latoh disposed in the path of the ledge, a car, a controller on the car, a detent operative independently of said controller and effective for holding the controller in a central position, and means upon the latch for holding the cletent in its eective position when the door is open and the detent, when in its ineffective position, serving to prevent 'etractive movement of the latch, and said ledge, when the door is open, being adapted to hold the latch in its retracted position.

7. The combination of an elevator-well having an opening, a door for said opening, a detent for holding the door shut, a car, a controller on the car, a pivoted latch operative independently of said controller and effective for holding the controller in a central posi tion, and means upon the latch for holding the detent in its effective position When the door is open, and the detent, when in its inefieetive position, serving to prevent retractive movement of the latch.

8. The combination of an elevator-well having an opening, a door for said opening, a detent for holding the door shut, a car, a controller on the car, a pivoted latch operative independently of said controller and effective for holding the controller in a central position, means upon the latch for holding the detent in its efieotive position when the door is open, and the detent, when in its ineflective position, serving to prevent retractive movement of the latch, and a bracket upon the car contiguous to the free end of the detent.

9. The conbination of an elevator-well having an opening, a door for said opening, alatch for holding the door' shut, a car, a controller on the car, having a projection, a detent hat nga notch to engage over said projection and a perforation, a pin upon the latch adapted to enter said perforation, and aledge extending across the door, the latch being disposed in the path of the ledge.

In testimony where'of I have herennto set my hand in presence of two subsc'ribing witnesses.

WILLI'AM H. WILSEY;

Witnesses:

C. W. TAYLOR, GRANT J. Ross. 

